Malicious PDF — malware analysis report

Static analysis result for SHA-256 772c0eb56dbd826a…

MALICIOUS

PDF

48.1 KB Created: 2020-08-23 09:47:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9733482bcf4143c87f4d3d41aa943273 SHA-1: 06531fb526dec8b3cfeca4d5488726ad911d2190 SHA-256: 772c0eb56dbd826ace5a0ce535c1e863259f0c4dd6d7eb9d812ee3acd8d930b8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded links, many of which point to potentially malicious redirectors or link farms. The document body is obfuscated but appears to contain keywords related to a game guide, suggesting a lure to attract users to click on the malicious links. The ML classifier strongly indicated maliciousness, and the presence of a known malicious redirector URL reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.com/pify?keyword=blade+and+soul+warden+pve+guide
    • http://tiwisol.boomerbones.com/uploads/1/3/1/0/131071157/9709720.pdf
    • http://gedawofaj.rmshiles.com/uploads/1/3/1/6/131606834/5845415.pdf
    • http://files.rethinkreframerelax.com/uploads/1/3/2/7/132710745/jizebivigupazowiba.pdf
    • http://files.altrimondifirenze.com/uploads/1/3/0/8/130873717/f1c167b169fbe.pdf
    • http://batebibu.softerthanbrittle.com/uploads/1/3/1/4/131407089/2348155.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/0292/0086/files/73465918476.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/vowojejupesat.pdf
    • https://cdn.shopify.com/s/files/1/0433/1077/6478/files/botw_title_key.pdf
    • https://cdn.shopify.com/s/files/1/0429/4203/8182/files/nurinebazatexiji.pdf
    • https://cdn.shopify.com/s/files/1/0430/1671/6437/files/adobe_animate_cc_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0431/7433/0517/files/vawarojiwenogomopajibofad.pdf
    • https://cdn.shopify.com/s/files/1/0430/6799/8359/files/wizarexe.pdf
    • https://cdn.shopify.com/s/files/1/0434/0203/5351/files/last_word_quest_guide_destiny_2.pdf
    • https://cdn.shopify.com/s/files/1/0434/2035/2677/files/tesla_effingham_performance_center_august_3.pdf
    • https://cdn.shopify.com/s/files/1/0428/1283/3959/files/jeep_cherokee_2017_maintenance_manual.pdf
    • https://cdn.shopify.com/s/files/1/0438/2402/1664/files/pasozinawesoxegomilujud.pdf
    • https://cdn.shopify.com/s/files/1/0431/7780/3925/files/bacteria_cell_wall_structure.pdf
    • https://cdn.shopify.com/s/files/1/0435/3543/3882/files/gowaxozalan.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007d4e.bin
08607aab3e60c8cb69ed848cb3ff134b628ffd86f8ef755b27f89fbfc3c7718e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4E 5328 bytes
font_01_sfnt_off00008f8e.bin
109bbba8595602325fb788dd2f66eb71b3c2b0780e52988521e39e640728ab45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F8E 10360 bytes

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